There are a list of important conventions and they are the following:
- Shot drawing
- Camera angle
- Camera movement
- Shot size
- Sound effects
- Soundtrack
- Film Ident's
- Film titles
Technology as changed so much over the years and so has animatics. They first started with the storyboard laid out all in order using special effect but know with all the editing system that are available it is easier and more technical.
Animatic are now still images made into a film format with music over the top and also with dialogue and sound effects involved as well.
The advantages of making an animatic is that the director will know how long the shot needs to be and what camera angles and movements need to be in the shot. He or She will watch the Animatic and use it to make the film.
I will know add some examples of animatics that I have looked at:
The video above shows both the animatic and the film.